H-Bridge Driver. DRV8841 Datasheet

DRV8841 Driver. Datasheet pdf. Equivalent

Part DRV8841
Description Dual H-Bridge Driver
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DRV8841
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DRV8841
SLVSAC0F – MAY 2010 – REVISED DECEMBER 2015
DRV8841 Dual H-Bridge Driver IC
1 Features
1 Dual H-Bridge DC Motor Driver
– Single and Dual Brushed DC
– Stepper
• PWM Control Interface
• Optional Fixed Frequency Current Regulation
– Two Bit Current Control Allows Up to Four
Current Levels
• Low MOSFET On-Resistance
– 2.5-A Maximum Drive Current at 24 V and
TA = 25°C
– Combined 400 mRDS(ON) of High-Side and
Low-Side at 24 V and TA = 25°C
• 8.2-V to 45-V Operating Supply Voltage Range
• Low Current Sleep Mode
• Built-In 3.3-V Reference Output
• Thermally Enhanced Surface Mount Package
• Protection Features
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– Undervoltage Lockout (UVLO)
– Fault Condition Indication Pin (nFAULT)
2 Applications
• Printers
• Scanners
• Office Automation Machines
• Gaming Machines
• Factory Automation
• Robotics
3 Description
The DRV8841 provides an integrated dual H-bridge
motor driver solution for printers, scanners, and other
automated equipment applications. The device can
be used to drive one or two brushed DC motors, a
bipolar stepper motor, or other loads. A simple PWM
interface allows easy interfacing to controller circuits.
The output driver block consists of N-channel power
MOSFETs configured as H-bridges. The DRV8841 an
supply up to 2.5-A peak or 1.75-A RMS output
current (with proper heat sinking at 24 V and
TA = 25°C) per H-bridge.
A low-power sleep mode is provided which shuts
down internal circuitry to achieve very low quiescent
current draw. This sleep mode can be set using a
dedicated nSLEEP pin. Internal protection features
are provided for overtemperature, overcurrent, and
undervoltage. Fault conditions are indicated by a
nFAULT pin.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8841
HTSSOP (28)
9.70 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
8.2 to 45 V
Controller
PWM
Decay Mode
Current Level
DRV8841
Dual
H-Bridge Motor
Driver
2.5 A
nFAULT
Protection
2.5 A
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



DRV8841
DRV8841
SLVSAC0F – MAY 2010 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings ............................................................ 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 6
6.6 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 14
8.1 Application Information............................................ 14
8.2 Typical Application .................................................. 14
9 Power Supply Recommendations...................... 17
9.1 Bulk Capacitance .................................................... 17
9.2 Power Supply and Logic Sequencing ..................... 17
10 Layout................................................................... 18
10.1 Layout Guidelines ................................................. 18
10.2 Layout Example .................................................... 18
10.3 Thermal Considerations ........................................ 18
11 Device and Documentation Support ................. 20
11.1 Documentation Support ........................................ 20
11.2 Community Resources.......................................... 20
11.3 Trademarks ........................................................... 20
11.4 Electrostatic Discharge Caution ............................ 20
11.5 Glossary ................................................................ 20
12 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
Changes from Revision E (August 2013) to Revision F
Page
• Added ESD Rating table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
• Updated Features section ...................................................................................................................................................... 1
• Updated Description section................................................................................................................................................... 1
• Changed the text under the EXTERNAL COMPONENTS OR CONNECTIONS column for the VMA and VMB rows ........ 3
• Changed MIN value for ISENSEx pin voltage from –0.3 V to –0.8 V..................................................................................... 5
2
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